So the idea here is an EDH subformat where the only playable generals are planeswalkers. Any planeswalker may be used as your general, and the usual rules of color identity apply. There are not very many altered rules in this format, and your general should be treated as normal in every way, however there is on additional rule, which is that you may not run additional planeswalkers/flipwalkers in your deck(Sorry Teferi). If you want to try it, hit me up on cockatrice @KathyCloven